git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/search.c

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2007 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn );
  42
  43 /*
  44  * Quick'n'dirty rewrite of filter in case of error, to deal with
  45  * <draft-zeilenga-ldap-t-f>.
  46  */
  47 static int
  48 ldap_back_munge_filter(
  49         Operation       *op,
  50         struct berval   *filter )
  51 {
  52         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  53
  54         char            *ptr;
  55         int             gotit = 0;
  56
  57         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  58                         filter->bv_val, 0, 0 );
  59
  60         for ( ptr = strstr( filter->bv_val, "(?=" );
  61                         ptr;
  62                         ptr = strstr( ptr, "(?=" ) )
  63         {
  64                 static struct berval
  65                         bv_true = BER_BVC( "(?=true)" ),
  66                         bv_false = BER_BVC( "(?=false)" ),
  67                         bv_undefined = BER_BVC( "(?=undefined)" ),
  68                         bv_t = BER_BVC( "(&)" ),
  69                         bv_f = BER_BVC( "(|)" ),
  70                         bv_T = BER_BVC( "(objectClass=*)" ),
  71                         bv_F = BER_BVC( "(!(objectClass=*))" );
  72                 struct berval   *oldbv = NULL,
  73                                 *newbv = NULL,
  74                                 oldfilter = BER_BVNULL;
  75
  76                 if ( strncmp( ptr, bv_true.bv_val, bv_true.bv_len ) == 0 ) {
  77                         oldbv = &bv_true;
  78                         if ( LDAP_BACK_T_F( li ) ) {
  79                                 newbv = &bv_t;
  80
  81                         } else {
  82                                 newbv = &bv_T;
  83                         }
  84
  85                 } else if ( strncmp( ptr, bv_false.bv_val, bv_false.bv_len ) == 0 )
  86                 {
  87                         oldbv = &bv_false;
  88                         if ( LDAP_BACK_T_F( li ) ) {
  89                                 newbv = &bv_f;
  90
  91                         } else {
  92                                 newbv = &bv_F;
  93                         }
  94
  95                 } else if ( strncmp( ptr, bv_undefined.bv_val, bv_undefined.bv_len ) == 0 )
  96                 {
  97                         oldbv = &bv_undefined;
  98                         newbv = &bv_F;
  99
 100                 } else {
 101                         gotit = 0;
 102                         goto done;
 103                 }
 104
 105                 oldfilter = *filter;
 106                 if ( newbv->bv_len > oldbv->bv_len ) {
 107                         filter->bv_len += newbv->bv_len - oldbv->bv_len;
 108                         if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 109                                 filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 110                                                 op->o_tmpmemctx );
 111
 112                                 AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 113                                                 op->ors_filterstr.bv_len + 1 );
 114
 115                         } else {
 116                                 filter->bv_val = op->o_tmprealloc( filter->bv_val,
 117                                                 filter->bv_len + 1, op->o_tmpmemctx );
 118                         }
 119
 120                         ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 121                 }
 122
 123                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 124                                 &ptr[ oldbv->bv_len ],
 125                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 126                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 127
 128                 ptr += newbv->bv_len;
 129                 gotit = 1;
 130         }
 131
 132 done:;
 133         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 134                         filter->bv_val, gotit, 0 );
 135
 136         return gotit;
 137 }
 138
 139 int
 140 ldap_back_search(
 141                 Operation       *op,
 142                 SlapReply       *rs )
 143 {
 144         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 145
 146         ldapconn_t      *lc = NULL;
 147         struct timeval  tv;
 148         time_t          stoptime = (time_t)(-1);
 149         LDAPMessage     *res,
 150                         *e;
 151         int             rc = 0,
 152                         msgid;
 153         struct berval   match = BER_BVNULL,
 154                         filter = BER_BVNULL;
 155         int             free_filter = 0;
 156         int             i;
 157         char            **attrs = NULL;
 158         int             freetext = 0;
 159         int             do_retry = 1, dont_retry = 0;
 160         LDAPControl     **ctrls = NULL;
 161         /* FIXME: shouldn't this be null? */
 162         const char      *save_matched = rs->sr_matched;
 163
 164         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 165                 return rs->sr_err;
 166         }
 167
 168         /*
 169          * FIXME: in case of values return filter, we might want
 170          * to map attrs and maybe rewrite value
 171          */
 172
 173         /* should we check return values? */
 174         if ( op->ors_deref != -1 ) {
 175                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 176                                 (void *)&op->ors_deref );
 177         }
 178
 179         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 180                 tv.tv_sec = op->ors_tlimit;
 181                 tv.tv_usec = 0;
 182                 stoptime = op->o_time + op->ors_tlimit;
 183
 184         } else {
 185                 LDAP_BACK_TV_SET( &tv );
 186         }
 187
 188         if ( op->ors_attrs ) {
 189                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 190                         /* just count attrs */ ;
 191
 192                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 193                 if ( attrs == NULL ) {
 194                         rs->sr_err = LDAP_NO_MEMORY;
 195                         rc = -1;
 196                         goto finish;
 197                 }
 198
 199                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 200                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 201                 }
 202                 attrs[ i ] = NULL;
 203         }
 204
 205         ctrls = op->o_ctrls;
 206         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 207                 li->li_version, &li->li_idassert, op, rs, &ctrls );
 208         if ( rc != LDAP_SUCCESS ) {
 209                 goto finish;
 210         }
 211
 212         /* deal with <draft-zeilenga-ldap-t-f> filters */
 213         filter = op->ors_filterstr;
 214 retry:
 215         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 216                         op->ors_scope, filter.bv_val,
 217                         attrs, op->ors_attrsonly, ctrls, NULL,
 218                         tv.tv_sec ? &tv : NULL,
 219                         op->ors_slimit, &msgid );
 220
 221         if ( rs->sr_err != LDAP_SUCCESS ) {
 222                 switch ( rs->sr_err ) {
 223                 case LDAP_SERVER_DOWN:
 224                         if ( do_retry ) {
 225                                 do_retry = 0;
 226                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 227                                         goto retry;
 228                                 }
 229                         }
 230
 231                         if ( lc == NULL ) {
 232                                 /* reset by ldap_back_retry ... */
 233                                 rs->sr_err = slap_map_api2result( rs );
 234
 235                         } else {
 236                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 237                         }
 238
 239                         goto finish;
 240
 241                 case LDAP_FILTER_ERROR:
 242                         if ( ldap_back_munge_filter( op, &filter ) ) {
 243                                 free_filter = 1;
 244                                 goto retry;
 245                         }
 246
 247                         /* invalid filters return success with no data */
 248                         rs->sr_err = LDAP_SUCCESS;
 249                         rs->sr_text = NULL;
 250                         goto finish;
 251
 252                 default:
 253                         rs->sr_err = slap_map_api2result( rs );
 254                         rs->sr_text = NULL;
 255                         goto finish;
 256                 }
 257         }
 258
 259         /* We pull apart the ber result, stuff it into a slapd entry, and
 260          * let send_search_entry stuff it back into ber format. Slow & ugly,
 261          * but this is necessary for version matching, and for ACL processing.
 262          */
 263
 264         for ( rc = 0; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 265         {
 266                 /* check for abandon */
 267                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 268                         if ( rc > 0 ) {
 269                                 ldap_msgfree( res );
 270                         }
 271                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 272                         rc = SLAPD_ABANDON;
 273                         goto finish;
 274                 }
 275
 276                 if ( rc == 0 ) {
 277                         LDAP_BACK_TV_SET( &tv );
 278                         ldap_pvt_thread_yield();
 279
 280                         /* check time limit */
 281                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 282                                         && slap_get_time() > stoptime )
 283                         {
 284                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 285                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 286                                 goto finish;
 287                         }
 288                         continue;
 289
 290                 } else {
 291                         /* only touch when activity actually took place... */
 292                         if ( li->li_idle_timeout && lc ) {
 293                                 lc->lc_time = op->o_time;
 294                         }
 295
 296                         /* don't retry any more */
 297                         dont_retry = 1;
 298                 }
 299
 300
 301                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 302                         Entry           ent = { 0 };
 303                         struct berval   bdn = BER_BVNULL;
 304
 305                         do_retry = 0;
 306
 307                         e = ldap_first_entry( lc->lc_ld, res );
 308                         rc = ldap_build_entry( op, e, &ent, &bdn );
 309                         if ( rc == LDAP_SUCCESS ) {
 310                                 rs->sr_entry = &ent;
 311                                 rs->sr_attrs = op->ors_attrs;
 312                                 rs->sr_operational_attrs = NULL;
 313                                 rs->sr_flags = 0;
 314                                 rs->sr_err = LDAP_SUCCESS;
 315                                 rc = rs->sr_err = send_search_entry( op, rs );
 316                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 317                                         assert( ent.e_name.bv_val != bdn.bv_val );
 318                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 319                                         BER_BVZERO( &ent.e_name );
 320                                 }
 321                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 322                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 323                                         BER_BVZERO( &ent.e_nname );
 324                                 }
 325                                 entry_clean( &ent );
 326                         }
 327                         ldap_msgfree( res );
 328                         if ( rc != LDAP_SUCCESS ) {
 329                                 if ( rc == LDAP_UNAVAILABLE ) {
 330                                         rc = rs->sr_err = LDAP_OTHER;
 331                                 } else {
 332                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 333                                 }
 334                                 goto finish;
 335                         }
 336
 337                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 338                         char            **references = NULL;
 339
 340                         do_retry = 0;
 341                         rc = ldap_parse_reference( lc->lc_ld, res,
 342                                         &references, &rs->sr_ctrls, 1 );
 343
 344                         if ( rc != LDAP_SUCCESS ) {
 345                                 continue;
 346                         }
 347
 348                         /* FIXME: there MUST be at least one */
 349                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 350                                 int             cnt;
 351
 352                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 353                                         /* NO OP */ ;
 354
 355                                 /* FIXME: there MUST be at least one */
 356                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 357                                         op->o_tmpmemctx );
 358
 359                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 360                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 361                                 }
 362                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 363
 364                                 /* ignore return value by now */
 365                                 ( void )send_search_reference( op, rs );
 366
 367                         } else {
 368                                 Debug( LDAP_DEBUG_ANY,
 369                                         "%s ldap_back_search: "
 370                                         "got SEARCH_REFERENCE "
 371                                         "with no referrals\n",
 372                                         op->o_log_prefix, 0, 0 );
 373                         }
 374
 375                         /* cleanup */
 376                         if ( references ) {
 377                                 ber_memvfree( (void **)references );
 378                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 379                                 rs->sr_ref = NULL;
 380                         }
 381
 382                         if ( rs->sr_ctrls ) {
 383                                 ldap_controls_free( rs->sr_ctrls );
 384                                 rs->sr_ctrls = NULL;
 385                         }
 386
 387                 } else {
 388                         char            **references = NULL, *err = NULL;
 389
 390                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 391                                         &match.bv_val, &err,
 392                                         &references, &rs->sr_ctrls, 1 );
 393                         if ( rc != LDAP_SUCCESS ) {
 394                                 rs->sr_err = rc;
 395                         }
 396                         rs->sr_err = slap_map_api2result( rs );
 397                         if ( err ) {
 398                                 rs->sr_text = err;
 399                                 freetext = 1;
 400                         }
 401
 402                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 403                                 int     cnt;
 404
 405                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 406                                         /* FIXME: error */
 407                                         Debug( LDAP_DEBUG_ANY,
 408                                                 "%s ldap_back_search: "
 409                                                 "got referrals with %d\n",
 410                                                 op->o_log_prefix,
 411                                                 rs->sr_err, 0 );
 412                                         rs->sr_err = LDAP_REFERRAL;
 413                                 }
 414
 415                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 416                                         /* NO OP */ ;
 417
 418                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 419                                         op->o_tmpmemctx );
 420
 421                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 422                                         /* duplicating ...*/
 423                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 424                                 }
 425                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 426                         }
 427
 428                         if ( match.bv_val != NULL ) {
 429 #ifndef LDAP_NULL_IS_NULL
 430                                 if ( match.bv_val[ 0 ] == '\0' ) {
 431                                         LDAP_FREE( match.bv_val );
 432                                         BER_BVZERO( &match );
 433                                 } else
 434 #endif /* LDAP_NULL_IS_NULL */
 435                                 {
 436                                         match.bv_len = strlen( match.bv_val );
 437                                 }
 438                         }
 439 #ifndef LDAP_NULL_IS_NULL
 440                         if ( rs->sr_text != NULL && rs->sr_text[ 0 ] == '\0' ) {
 441                                 LDAP_FREE( (char *)rs->sr_text );
 442                                 rs->sr_text = NULL;
 443                         }
 444 #endif /* LDAP_NULL_IS_NULL */
 445
 446                         /* cleanup */
 447                         if ( references ) {
 448                                 ber_memvfree( (void **)references );
 449                         }
 450
 451                         rc = 0;
 452                         break;
 453                 }
 454         }
 455
 456         if ( rc == -1 && dont_retry == 0 ) {
 457                 if ( do_retry ) {
 458                         do_retry = 0;
 459                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 460                                 goto retry;
 461                         }
 462                 }
 463                 rs->sr_err = LDAP_SERVER_DOWN;
 464                 rs->sr_err = slap_map_api2result( rs );
 465                 goto finish;
 466         }
 467
 468         /*
 469          * Rewrite the matched portion of the search base, if required
 470          */
 471         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 472                 struct berval   pmatch;
 473
 474                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 475                         rs->sr_matched = pmatch.bv_val;
 476                         LDAP_FREE( match.bv_val );
 477
 478                 } else {
 479                         rs->sr_matched = match.bv_val;
 480                 }
 481         }
 482
 483         if ( rs->sr_v2ref ) {
 484                 rs->sr_err = LDAP_REFERRAL;
 485         }
 486
 487 finish:;
 488         if ( LDAP_BACK_QUARANTINE( li ) ) {
 489                 ldap_back_quarantine( op, rs );
 490         }
 491
 492 #if 0
 493         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 494         if ( rc != SLAPD_ABANDON )
 495 #endif
 496         {
 497                 send_ldap_result( op, rs );
 498         }
 499
 500         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 501
 502         if ( rs->sr_ctrls ) {
 503                 ldap_controls_free( rs->sr_ctrls );
 504                 rs->sr_ctrls = NULL;
 505         }
 506
 507         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 508                 if ( rs->sr_matched != match.bv_val ) {
 509                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 510
 511                 } else {
 512                         LDAP_FREE( match.bv_val );
 513                 }
 514                 rs->sr_matched = save_matched;
 515         }
 516
 517         if ( free_filter ) {
 518                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 519         }
 520
 521         if ( rs->sr_text ) {
 522                 if ( freetext ) {
 523                         LDAP_FREE( (char *)rs->sr_text );
 524                 }
 525                 rs->sr_text = NULL;
 526         }
 527
 528         if ( rs->sr_ref ) {
 529                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 530                 rs->sr_ref = NULL;
 531         }
 532
 533         if ( attrs ) {
 534                 ch_free( attrs );
 535         }
 536
 537         if ( lc != NULL ) {
 538                 ldap_back_release_conn( li, lc );
 539         }
 540
 541         return rs->sr_err;
 542 }
 543
 544 static int
 545 ldap_build_entry(
 546                 Operation       *op,
 547                 LDAPMessage     *e,
 548                 Entry           *ent,
 549                 struct berval   *bdn )
 550 {
 551         struct berval   a;
 552         BerElement      ber = *e->lm_ber;
 553         Attribute       *attr, **attrp;
 554         const char      *text;
 555         int             last;
 556
 557         /* safe assumptions ... */
 558         assert( ent != NULL );
 559         BER_BVZERO( &ent->e_bv );
 560
 561         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 562                 return LDAP_DECODING_ERROR;
 563         }
 564
 565         /*
 566          * Note: this may fail if the target host(s) schema differs
 567          * from the one known to the meta, and a DN with unknown
 568          * attributes is returned.
 569          *
 570          * FIXME: should we log anything, or delegate to dnNormalize?
 571          */
 572         /* Note: if the distinguished values or the naming attributes
 573          * change, should we massage them as well?
 574          */
 575         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 576                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 577         {
 578                 return LDAP_INVALID_DN_SYNTAX;
 579         }
 580
 581         attrp = &ent->e_attrs;
 582
 583         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 584                 int                             i;
 585                 slap_syntax_validate_func       *validate;
 586                 slap_syntax_transform_func      *pretty;
 587
 588                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 589                 if ( attr == NULL ) {
 590                         continue;
 591                 }
 592                 attr->a_flags = 0;
 593                 attr->a_next = 0;
 594                 attr->a_desc = NULL;
 595                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 596                                 != LDAP_SUCCESS )
 597                 {
 598                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 599                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 600                         {
 601                                 Debug( LDAP_DEBUG_ANY,
 602                                         "%s ldap_build_entry: "
 603                                         "slap_bv2undef_ad(%s): %s\n",
 604                                         op->o_log_prefix, a.bv_val, text );
 605                                 ch_free( attr );
 606                                 continue;
 607                         }
 608                 }
 609
 610                 /* no subschemaSubentry */
 611                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 612                         || attr->a_desc == slap_schema.si_ad_entryDN )
 613                 {
 614
 615                         /*
 616                          * We eat target's subschemaSubentry because
 617                          * a search for this value is likely not
 618                          * to resolve to the appropriate backend;
 619                          * later, the local subschemaSubentry is
 620                          * added.
 621                          *
 622                          * We also eat entryDN because the frontend
 623                          * will reattach it without checking if already
 624                          * present...
 625                          */
 626                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 627
 628                         ch_free( attr );
 629                         continue;
 630                 }
 631
 632                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 633                                 || attr->a_vals == NULL )
 634                 {
 635                         /*
 636                          * Note: attr->a_vals can be null when using
 637                          * values result filter
 638                          */
 639                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 640                         last = 0;
 641
 642                 } else {
 643                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 644                                 /* just count vals */ ;
 645                 }
 646
 647                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 648                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 649
 650                 if ( !validate && !pretty ) {
 651                         attr->a_nvals = NULL;
 652                         attr_free( attr );
 653                         goto next_attr;
 654                 }
 655
 656                 for ( i = 0; i < last; i++ ) {
 657                         struct berval   pval;
 658                         int             rc;
 659
 660                         if ( pretty ) {
 661                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 662                                         &attr->a_vals[i], &pval, NULL );
 663
 664                         } else {
 665                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 666                                         &attr->a_vals[i] );
 667                         }
 668
 669                         if ( rc != LDAP_SUCCESS ) {
 670                                 /* check if, by chance, it's an undefined objectClass */
 671                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 672                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 673                                 {
 674                                         ber_dupbv( &pval, &attr->a_vals[i] );
 675
 676                                 } else {
 677                                         attr->a_nvals = NULL;
 678                                         attr_free( attr );
 679                                         goto next_attr;
 680                                 }
 681                         }
 682
 683                         if ( pretty ) {
 684                                 LBER_FREE( attr->a_vals[i].bv_val );
 685                                 attr->a_vals[i] = pval;
 686                         }
 687                 }
 688
 689                 if ( last && attr->a_desc->ad_type->sat_equality &&
 690                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 691                 {
 692                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 693                         for ( i = 0; i < last; i++ ) {
 694                                 int             rc;
 695
 696                                 /*
 697                                  * check that each value is valid per syntax
 698                                  * and pretty if appropriate
 699                                  */
 700                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 701                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 702                                         attr->a_desc->ad_type->sat_syntax,
 703                                         attr->a_desc->ad_type->sat_equality,
 704                                         &attr->a_vals[i], &attr->a_nvals[i],
 705                                         NULL );
 706
 707                                 if ( rc != LDAP_SUCCESS ) {
 708                                         BER_BVZERO( &attr->a_nvals[i] );
 709                                         ch_free( attr );
 710                                         goto next_attr;
 711                                 }
 712                         }
 713                         BER_BVZERO( &attr->a_nvals[i] );
 714
 715                 } else {
 716                         attr->a_nvals = attr->a_vals;
 717                 }
 718                 *attrp = attr;
 719                 attrp = &attr->a_next;
 720
 721 next_attr:;
 722         }
 723
 724         return LDAP_SUCCESS;
 725 }
 726
 727 /* return 0 IFF we can retrieve the entry with ndn
 728  */
 729 int
 730 ldap_back_entry_get(
 731                 Operation               *op,
 732                 struct berval           *ndn,
 733                 ObjectClass             *oc,
 734                 AttributeDescription    *at,
 735                 int                     rw,
 736                 Entry                   **ent )
 737 {
 738         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 739
 740         ldapconn_t      *lc = NULL;
 741         int             rc = 1,
 742                         do_not_cache;
 743         struct berval   bdn;
 744         LDAPMessage     *result = NULL,
 745                         *e = NULL;
 746         char            *attr[3], **attrp = NULL;
 747         char            *filter = NULL;
 748         SlapReply       rs;
 749         int             do_retry = 1;
 750         LDAPControl     **ctrls = NULL;
 751
 752         *ent = NULL;
 753
 754         /* Tell getconn this is a privileged op */
 755         do_not_cache = op->o_do_not_cache;
 756         op->o_do_not_cache = 1;
 757         if ( !ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 758                 op->o_do_not_cache = do_not_cache;
 759                 return rs.sr_err;
 760         }
 761         op->o_do_not_cache = do_not_cache;
 762
 763         if ( at ) {
 764                 attrp = attr;
 765                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 766                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 767                         attr[1] = at->ad_cname.bv_val;
 768                         attr[2] = NULL;
 769
 770                 } else {
 771                         attr[0] = at->ad_cname.bv_val;
 772                         attr[1] = NULL;
 773                 }
 774         }
 775
 776         if ( oc ) {
 777                 char    *ptr;
 778
 779                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 780                                 + oc->soc_cname.bv_len + 1 );
 781                 ptr = lutil_strcopy( filter, "(objectclass=" );
 782                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 783                 *ptr++ = ')';
 784                 *ptr++ = '\0';
 785         }
 786
 787 retry:
 788         ctrls = op->o_ctrls;
 789         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 790                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 791         if ( rc != LDAP_SUCCESS ) {
 792                 goto cleanup;
 793         }
 794
 795         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 796                                 attrp, 0, ctrls, NULL,
 797                                 NULL, LDAP_NO_LIMIT, &result );
 798         if ( rc != LDAP_SUCCESS ) {
 799                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 800                         do_retry = 0;
 801                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 802                                 /* if the identity changed, there might be need to re-authz */
 803                                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 804                                 goto retry;
 805                         }
 806                 }
 807                 goto cleanup;
 808         }
 809
 810         e = ldap_first_entry( lc->lc_ld, result );
 811         if ( e == NULL ) {
 812                 /* the entry exists, but it doesn't match the filter? */
 813                 goto cleanup;
 814         }
 815
 816         *ent = ch_calloc( 1, sizeof( Entry ) );
 817         if ( *ent == NULL ) {
 818                 rc = LDAP_NO_MEMORY;
 819                 goto cleanup;
 820         }
 821
 822         rc = ldap_build_entry( op, e, *ent, &bdn );
 823
 824         if ( rc != LDAP_SUCCESS ) {
 825                 entry_free( *ent );
 826                 *ent = NULL;
 827         }
 828
 829 cleanup:
 830         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 831
 832         if ( result ) {
 833                 ldap_msgfree( result );
 834         }
 835
 836         if ( filter ) {
 837                 ch_free( filter );
 838         }
 839
 840         if ( lc != NULL ) {
 841                 ldap_back_release_conn( li, lc );
 842         }
 843
 844         return rc;
 845 }
 846